Zarr
What is it?
The zarr library is a Python implementation of the Zarr storage format. zarr delivers compressed, chunked, N-dimensional arrays that work well for parallel computing and object storage. See the documentation for more information.
Main Features
- Create N-dimensional arrays with NumPy-compatible
dtypes. - Chunk arrays along any dimension.
- Encode chunks using a variety of useful encodings (e.g., compression).
- Store arrays in memory, on disk, inside a zip file, on S3, etc...
- Read an array concurrently from multiple threads or processes.
- Write to an array concurrently from multiple threads or processes.
- Organize arrays into hierarchies via groups.
Where to get it
Zarr can be installed from PyPI using pip:
pip install zarr
or via conda:
conda install -c conda-forge zarr
For more details, including how to install from source, see the installation documentation.
Repository sub-packages
In addition to the primary zarr implementation, this repository contains other packages that provide specialized functionality with minimal dependencies:
zarr-metadata: Tools for Zarr metadata. Install withpip install zarr-metadata.zarr-indexing: Tools for lazily indexing chunked arrays. Install withpip install zarr-indexing.zarr-http-server: An HTTP server implementation targeting Zarr data. Install withpip install zarr-http-server.
Release files for zarr 3.4.2
For a detailed explanation of source distributions (sdists) and built distributions (wheels), please see the package formats documentation.
Source distribution (sdist)
| File | Size | Uploaded | Provenance | |
|---|---|---|---|---|
| zarr-3.4.2.tar.gz | 943.6 kB | With provenance | Details |
Built distribution (wheel)
| File | Interpreter | ABI | Platform | Reset |
|---|---|---|---|---|
| zarr-3.4.2-py3-none-any.whl | Python 3 | none | any | Details |
Total release size: 1.4 MB
Release files / zarr-3.4.2.tar.gz
| Download URL | zarr-3.4.2.tar.gz |
|---|---|
| Size | 943.6 kB |
| Tags | Source |
|
SHA-256 checksum How to use checksums |
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BLAKE2b-256 checksum How to use checksums |
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Uploaded using Trusted Publishing? What is trusted publishing? |
Yes |
| Uploaded via |
twine/7.0.0 CPython/3.13.14
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Transparency logRelease files / zarr-3.4.2-py3-none-any.whl
| Download URL | zarr-3.4.2-py3-none-any.whl |
|---|---|
| Size | 410.8 kB |
| Tags | Python 3 |
|
SHA-256 checksum How to use checksums |
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|
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BLAKE2b-256 checksum How to use checksums |
8b1956f6907c420c54c7c81a648a266bd047882515fd5182ad432d5e6ca2d545
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| Upload date | |
|
Uploaded using Trusted Publishing? What is trusted publishing? |
Yes |
| Uploaded via |
twine/7.0.0 CPython/3.13.14
|
Provenance
Provenance describes where a file came from. On PyPI, provenance is shared via attestations, which provide a verifiable record of the build or publishing details. View details, limitations and caveats.
PyPI Publish Attestation
PyPI verified that this artifact, at this checksum, originated from the publisher listed below.
Signed by GitHub Actions, verified by PyPI on Oct 27, 2026.
Transparency logSecurity for zarr 3.4.2
Provenance
Provenance describes where a file came from. On PyPI, provenance is shared via attestations, which provide a verifiable record of the build or publishing details. View details, limitations and caveats.
Full provenance
All 2 files in this release have been uploaded with provenance metadata.
Attestation for zarr-3.4.2.tar.gz
PyPI Publish Attestation
PyPI verified that this artifact, at this checksum, originated from the publisher listed below.
Signed by GitHub Actions, verified by PyPI on Oct 27, 2026.
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